You may also find this
page interesting -- a white paper
which discusses converting Unix servers to Windows. It's old, but it's still interesting.

And here's the job description:

SOFTWARE DEVELOPMENT ENGINEER [Job Code: N05rc-en ]
The Hotmail development team needs a Software Design Engineer to work on the design and development of the next
generation of backend servers. The new backend servers are WIN32 replacements for the current Solaris implementation.
This is a great opportunity to be involved with the development of a one of the most scalable technologies at
Microsoft. You will be a senior member of the development team, responsible for desigining and building a family of
secure, reliable, scalable, and maintainable servers. A track record of successfully delivering server products is
required. Excellent communications skills are required. Five years experience with C/C++ is required. Experience with
OLEDB or ODBC and SQL Server database design is required. Experience with server threading and asynchronization
techniques, NT Services, and C# experience is desired. A bachelor's degree in computer science or engineering is
desired.